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iOS

Posted by Renee Rhodes
Renee Rhodes
10,653 Points

Error when calculating error in sq. meters

I get an error "type int does not conform to protocol" with this code:

let height = 12 //In Feet let width = 10 //In Feet

let area = height * width

//1 sq. meter = 1 sq. foot / 10.764 let areaInMeters = area / 10.764

I have compared it side by side to the video and it is identical in every way I can see. I have a screen cap but I can't upload it here.

It works just fine when change it to:

let height = 12.0 //In Feet let width = 10.0 //In Feet

let area = height * width

//1 sq. meter = 1 sq. foot / 10.764 let areaInMeters = area / 10.764

1 Answer

William Li
William Li
Courses Plus Student 26,868 Points

Hi, Renee Rhodes ,

Someone has provided a pretty detailed answer to a similar question here https://teamtreehouse.com/forum/error-type-int-does-not-conform-to-protocol-floatliteralconvertible-i-had-to-use-120-100

I have compared it side by side to the video and it is identical in every way I can see

Yeah, I totally get what you are talking about, in the video, Amit typed this line let areaInMeters = area / 10.764 and The playground is totally okay with the mixing types. But I'd suggest that you shouldn't get too hung up on this, remember that Swift is a very young language, and Apple is making change and improvement to it very aggressively since Swift's first public release last year, it's entirely possible that Apple implemented some breaking change to Swift' language specs in the newer version of Xcode since this course video was made.